Padding Structure for a Chair

ABSTRACT

A padding structure for a chair comprises a back support and a seat plate, a foam disposed to the back support, two guiding lines mounted on the back support, and two guiding lines mounted on the seat plate, each guiding line of the back support and the seat plate connected with a resilient member to control flexibility of the resilient member, and an adjustable member being used to control the expansion and retraction of the guiding lines to drive the resilient members to change their radians, correcting user&#39;s improper posture.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a padding structure, and more particularly to a padding structure for a chair that can completely support user's waist and correct improper posture.

2. Description of the Prior Art

A padding structure for a chair includes a chair back and a cushion to support a user as he sitting on the chair.

A conventional padding structure for a chair includes a back support, a seat plate having foam attached thereon and covered by a cloth, such that user can sit on the cushion and lie to the chair back, feeling comfortable. In recent years, a guiding line is used to control a resilient member which is defined between the back support and the foam to change its radian so as to bend the foam, thus supporting user's back. However, the user's waist can not be supported by the chair back, causing a fatigue.

In addition, general chairs can not be adjusted the height, therefore the user with high height has to suspend his lower portions of thighs, feeling uncomfortable.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a padding structure for a chair that can completely support user's waist and correct improper posture.

To obtain the above objective, a padding structure for a chair provided by the present invention comprises a back support and a seat plate, a foam disposed to the back support, two guiding lines mounted on the back support, and two guiding lines mounted on the seat plate, each guiding line of the back support and the seat plate connected with a resilient member to control flexibility of the resilient member. Besides, an adjustable member is used to control the expansion and retraction of the guiding lines to drive the resilient members to change their radians, correcting user's improper posture.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an assembly view of a padding structure for a chair in accordance with a first embodiment of the present invention;

FIG. 2 is an assembly view of a resilient member in accordance with the first embodiment of the present invention;

FIG. 3 is a plane view showing the operation of the padding structure for a chair in accordance with the first embodiment of the present invention;

FIG. 4 is another plane view showing the operation of the padding structure for a chair in accordance with the first embodiment of the present invention;

FIG. 5 is an assembly view of a padding structure for a chair in accordance with a second embodiment of the present invention;

FIG. 6 is an exploded view of an adjustable member in accordance with the second embodiment of the present invention;

FIG. 7 is a plane view showing the operation of the padding structure for a chair in accordance with the second embodiment of the present invention;

FIG. 8 is an assembly view of a cushion of the padding structure for a chair in accordance with the second embodiment of the present invention;

FIG. 9 is a plane view showing the operation of the cushion of the padding structure for a chair in accordance with the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A padding structure for a chair in accordance with the present invention comprises a back support 1, a foam 5 disposed to the back support 1, two guiding lines 3, each mounted on the back support 1 and connect with a resilient member 2 to change a radian of the resilient member 2 (as shown in FIG. 1, the foam 5 attached on the back support 1, the resilient members 2, and a cloth covered on the back support 1 are well known, accordingly further remarks are omitted). Besides, an adjustable member 4 is used to control the expansion and retraction of the guiding lines 3 so as to drive the resilient members 2 to change their radians, correcting user's improper posture.

The resilient member 2 is an arcuate flexible seat plate (as shown in FIG. 2), and its two ends are connected together by using the guiding line 3 to change a distance between the two ends (as illustrated in FIG. 3) of the resilient member 2, adjusting the radian of the resilient member 2. Furthermore, the resilient member 2 can contact two sides of user's waist so that as desiring to adjust the resilient member 2, the adjustable member 4 can adjust the expansion and retraction of the guiding lines 3 to change the radian of the resilient member 2, such as becoming convexed inward or expanding outward (as shown in FIG. 4). Thereafter, the radian of the foam 5 is changed to match a width of user's waist, thereby enabling a chair back 10 to completely support user's waist and correct improper posture.

A chair back 10 in accordance with a second embodiment of the present invention includes a longitudinal resilient member 6 (as illustrated in FIG. 5) arranged between the resilient members 2 to be adjusted its flexibility to support user's waist and back, thus enhancing comfort of the chair back 10.

To operate the guiding lines 3 easily, the adjustable member 4 can be provided with a rotating member 41 having a shaft member 42 selectively inserted in a first worm gear 43 or a second worm gear 44 to actuate a first toothed reel 45 or a second toothed reel 46 (as illustrated in FIG. 6), wherein one end of each of the guiding lines 3 on the two sides of the resilient member 2 is rolled onto the first toothed reel 45, and a guiding line of the longitudinal resilient member 6 is rolled onto the second toothed reel 46 so that the first toothed reel 45 can simultaneously actuate the resilient members 2 to be adjusted. Besides, a screw 44 is inserted to the shaft member 42 of the rotating member 41 to actuate the second toothed reel 46 so that the longitudinal resilient member 6 can be actuated to change its radian (as illustrated in FIG. 7).

The padding structure of the present invention can be a cushion 20 so that the guiding lines 3 on the two sides of a seat plate 201 is controlled to operate the resilient members 2 (as shown in FIG. 8), such that the guiding lines 3 are expanded or extracted by the adjustable member 4 to change radians of the resilient members 2, thus making the foam 5 contact and support user's legs (as illustrated in FIG. 9).

The resilient members 2 on the cushion 20 can be arranged on a front side of the seat plate 201 to change their radians as pushing the foam 5 upward.

While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

1. A padding structure for a chair comprising a back support, a foam disposed to the back support, two guiding lines, each mounted on the back support and connect with a resilient member to control the operation of the resilient member, and an adjustable member allowing to control the expansion and retraction of the guiding lines to drive the resilient members to change their radians, correcting user's improper posture.
 2. The padding structure for a chair as claimed in claim 1, wherein between the resilient members is arranged a longitudinal resilient member to be adjusted to support user's waist and back.
 3. The padding structure for a chair as claimed in claim 1, wherein the resilient member is an arcuate flexible seat plate, and its two ends are connected together by using the guiding line to change a distance between its two ends so as to adjust its radian.
 4. The padding structure for a chair as claimed in claim 2, wherein the resilient member is an arcuate flexible seat plate, and its two ends are connected together by using the guiding line to change a distance between its two ends so as to adjust its radian.
 5. A padding structure for a chair comprising two guiding lines disposed on two sides of a seat plate to be controlled to operate two resilient members respectively, such that the guiding lines are expanded or extracted by an adjustable member to change radians of the resilient members, thus making a foam contact and support user's legs.
 6. The padding structure for a chair as claimed in claim 5, wherein the resilient members are laterally arranged on the seat plate. 